One of the most common things I do on Linux machines is open ports to test software in a development environment. In the past, that meant trying to remember (and Googling) cryptic
iptables commands. Now, CentOS 7 and Red Hat 7 include the nicer
firewall-cmd tool to configure the firewall.

During your stint as a Linux administrator, you’ll likely want to send mail from the server you are working on. Whether its sending a quick test message or emailing yourself a file, it can be done quickly and easily. Continue Reading…

We’ve seen the articles about how to find out if you’re vulnerable to the bash shellshock bug, we’ve also seen the articles on how to patch your system. What I’ll show you is how to find out if people are testing your system.

If you want to see a collection of your previous commands used in Linux, you can always type ‘history’ for a listing of them. You can even search through history by grepping for the command you’re looking for, but then you’d have to copy/paste it into the terminal to run it again. Here’s a great shortcut to help you out!Continue Reading…